On the Urbach rule in non-crystalline solids

Abstract A comparative analysis of temperature behavior of optical absorption edge is performed for non-crystalline materials where the Urbach behavior is observed (SiO 2 ), with deviations from the Urbach behavior (20PbO · 80SiO 2 ) and with a mixed behavior (As 2 S 3 ). For glassy As 2 S 3 , the Urbach behavior of the absorption edge in a limited temperature range is explained from the point of view of two components of structural disordering – static and dynamic. A parallel red shift of the absorption edge in As 2 S 3 and, consequently, the temperature-independent Urbach energy at T

[1]  I. Studenyak,et al.  Urbach rule and disordering processes in Cu6P(S1−xSex)5Br1−yIy superionic conductors , 2006 .

[2]  F. Urbach.  The Long-Wavelength Edge of Photographic Sensitivity and of the Electronic Absorption of Solids , 1953 .

[3]  Shane Johnson,et al.  Temperature dependence of the Urbach edge in GaAs , 1995 .

[4]  J. Nishii,et al.  UV absorption edge shift by doping alkali fluorides in fluoroaluminate glass , 2002 .

[5]  C. Rincón,et al.  Urbach–Martienssen’s tail in the absorption spectra of the ordered vacancy compound CuIn3Se5 , 1998 .

[6]  Cohen,et al.  Theory of electron band tails and the Urbach optical-absorption edge. , 1986, Physical review letters.

[7]  C. Hogarth,et al.  Optical Properties of Amorphous Thin Films of MoO3 Deposited by Vacuum Evaporation , 1988, October 16.

[8]  J. Tauc,et al.  Absorption edge and internal electric fields in amorphous semiconductors , 1970 .

[9]  A. Zatsepin,et al.  The Urbach rule for the PbO-SiO2 glasses , 2000 .

[10]  Edge absorption spectra of crystalline and glassy PbGeS3 , 2007 .

[11]  D. Desnica,et al.  Optical absorption EDGE and urbach's rule in mixed single crystals of (GaxIn1-x)2Se3 in the indium rich region , 1991 .

[12]  G. Cody.  Urbach edge of crystalline and amorphous silicon : a personal review , 1992 .

[13]  M. Kurik,et al.  Exciton–Phonon Interaction in Crystals of Linear Polyacenes , 1974 .

[14]  K. Hübner,et al.  Exciton-phonon interaction in crystalline and vitreous SiO2 , 1983 .

[15]  Glyde,et al.  Anomalous Urbach tail in GaAs. , 1995, Physical review. B, Condensed matter.

[16]  A. Ghosh,et al.  Photoacoustic spectroscopic estimation of optical absorption and thermal diffusivity of amorphous Ge15AsxSe85−x , 1996 .

[17]  B. G. Brooks,et al.  Disorder and the Optical-Absorption Edge of Hydrogenated Amorphous Silicon , 1981 .

[18]  Kevin P. Homewood,et al.  Optical absorption study of ion beam synthesized polycrystalline semiconducting FeSi2 , 1995 .

[19]  Atsuko Sumi,et al.  The Urbach-Martienssen Rule Revisited , 1987 .

[20]  H. Efeoglu,et al.  Temperature dependence of the optical energy gap and Urbach–Martienssen’s tail in the absorption spectra of the layered semiconductor Tl2GaInSe4 , 2001 .